Save-all



R. S. CLARKE.

SAVE ALL. APPLICATION FILED JULY 23,1919.

Patented Apr. 27, 1920.

2 SHEETS-SHEET l- Inventor.- 505 S Charla R. S. CLARKE.

SAVE ALL.

APPLICATION FILED .IULY 23,1919.

Patented Apr. 27, 1920.

2 SHEETSSHEET 2.

r8 fa, WMMM a m M Z n I R wheel 12 about which passes a belt 13.

" UNITED STATES PATENT oFrIoE.

RALPH S. CLARKE, 0F WALPOLE, MASSACHUSETTS, ASSIGNOR T0 BIRD MACHINE COMPANY, A CORPORATION OF MASSACHUSETTS.

SAVE-ALT.

Specification of Letters Patent.

Application filed July 23, 1919. Serial No. 312,875.

7 0 all whom it may concern:

Be it known that I, RALPH S. CLARKE, a citizen ,of the United States, residing at WValpole, in the county of Norfolk and State of Massachusetts, have invented certain new and useful Improvements in Save-Alls, of which the following is a specification.

This invention pertains to save-alls for paper machines, and has reference more particularly to the means employed for regulating or controlling the water supply which passes to the shower pipe employed in conjunction with the screen.

The invention is illustrated in the annexed drawings, wherein:

Figure 1 is an end elevation of the machine;

Fig. 2 a side elevation thereof;

Fig. 3 a detail sectional elevation of the float controlled shaft and the allied valve operating parts; and

Fig. 4 a, sectional plan illustrative of the float connections.

In said drawings, 1 denotes the vat having an inlet 2 and an overflow 3, the latter opening into a lateral extension 4 of the vat or tank. The screening cylinder is denoted by 5 and the discharge from the interior thereof takes place through the outlet 6. The retained pulp is removed from the machine by a centrifugal pump 7 as is usual.

The screen is carried by suitable bearings and the hollow supporting shaft 8 thereof at the right in Fig. 2 has secured thereto a large driving gear 9. A suitable stub shaft 10 carries a driving pinion 11 which meshes with gear 9, said shaft also carrying a publley aid belt in turn passes about a second and smaller pulley wheel 14 mounted to rotate upon a fixed shaft 15, the inner end of which is secured in a bracket 16 secured to the side wall of the tank extension4, see Fig. A band wheel 17 secured to the pulley 14 is driven by a constantly driven power belt 18 and serves through pullev 14 and belt .13 to impart movement to band wheel 12 and to the screen through pinion 11 and gear 9.

Belt 13 is of such length that when slack no motion is imparted to the screen and means is provided which is controlled by the height of the liquid within the tank for tensioning the said belt, said means also controlling the supply of water to the spray pipe.

J ournaled on the shaft 15 intermediate the bracket 16 and pulley 17 is a sleeve-like member 19 provided with a downwardly extending arm or lever 20. Said arm at its lower end has fixedly mounted therein a laterally extending shaft 21' upon which is journaled a wheel 22 which stands in line Patented Ap1'.27, 1920.

with and bears against the belt 13, said the level of the water rises and falls within the tank and extension 4, the float is carried therewith, the rise causing the float through the parts just described, to rotate sleeve 19 and to swing arm 20 inwardly forcing roller 22 against belt 13 and placing the same under tension. At such time the screen will be rotated at its highest speed. As the water level drops, for one or another reason, the float also moves with it and consequently the roller 22 tends to move away from belt 13, lessening the tension thereof and lowering the speed of rotation of the screen. When the float reaches the lowest level the roller will be in such position that all active pressure on the belt is removed and the screen comes to rest.

Mounted Within the screen is a spray pipe 27, said pipe being carried by arms 28, the inner ends of which are secured to the wash water supply pipe 29 which extends axially through the machine, a branch 30 extending therefrom to the spray pipe. A valve 31 is; connected into the outer end of the supply pipe and a valve-operating-lever 32 is connected thereto. Said lever is connected by a draw rod or bar 33 to a second lever 34 which latter is fixedly attached to the outer end of shaft 21. As a consequence of such arrangement, as arms 20 and 34 (which move as one) swing under the ac tion of, the rising or falling of the. float, the valve will be opened and closed to a greater or less extent. As the movement of the float controls the speed of the screen, it will be seen that the amount of water which will pass to and through the spray pipe 27 will be regulated in accordance with such screen movement, the greater the screen speed the wheel tending to tension the belt as the arm I greater the amount of water which passes through valve 31 to the spray pipe and, conversely, as the screen speed falls the water is proportionally cut off from the spray pipe. In other words, the current of water which passes to the spray pipe is directly proportional to the speed of the screen travel, and such speed and supply are automatically controlled and regulated by the level of the water in the tank.

The degree of opening and closing of the valve may be regulated by adjusting the point of connection of rod 33 to the levers 32 and 34. The fiber which is gathered by the screen is driven off by the shower and falls into a compartment 35 from which it will be pumped to the point where it is to be used.

\Vhat is claimed is,

1. In a machine of the class described, the combination of a tank; a screen mounted for rotation therein; a spray pipe adapted to project a shower against the screen surface; and means controlled by the level of the waterin the tank for regulating the speed of rotation of the screen and the flow of water through the spray pipe.

2. In a machine of the class described, the combination of a tank; a screen mounted for rotation therein; a spray pipe adapted to project a shower against the screen surface; and float actuated means controlled by the level of the water in the tank for regulating the speed of rotation of the screen and the flow of water through the spray pipe.

3. In a machine of the class described, the combination of a tank; a screen mounted for rotation therein; a spray pipe adapted to project a shower against the screen surface; and means controlled by the level of the water in the tank for directly regulating the amount of water which may pass to the spray pipe.

4. In a machine of the class described, the combination of a tank; a screen mounted for rotation therein; a spray pipe adapted to project a shower against the screen surface; a valve controlling the supply of water to said pipe; variable driving means for the screen; and means controlled by the level of the water in the tank for simultaneously regulating the valve and said driving means.

5. In a machine of the class described, the combination of a tank; a screen mounted for rotation therein; a spray pipe adapted to project a shower against the screen surface; a valve controlling the supply of water to said pipe; variable driving means for the screen; and float actuated means controlled by the level of the water in the tank and the valve for opening and closing the same.

In testimony whereof I have signed my name to this specification.

RALPH S. CLARKE. 

